It is disturbing to notice that large differences can occur when designing reinforced concrete cantilever slabs for strength by elastic methods or, alternatively, by ultimate approaches such as the yield-line analysis. The results are therefore reported of a comparison between elastic analysis, yield-line analysis and laboratory tests for reinforced concrete cantilever slabs subjected to point loading.

In essence, the theoretical study embraces a number of different reinforcement arrangements in a slab of infinite length and finite span.
The laboratory tests were performed on three slabs with a length to span ratio of 6 and on three further slabs with a length to span ratio of 8,8. The major purpose of these tests was to measure the actual failure loads for comparison with theoretical results.
A conclusion has been drawn regarding the suitability of the yield-line approach in analysing slabs of the nature investigated in this study. In addition, the serviceability limit state of deflection is discussed in some detail using the load-deflection curves recorded during the experiments.

The results of a survey of current stormwater drainage design practice are presented. The survey, undertaken by the National Building Research Institute during 1979, took the form of a questionnaire sent to various design offices in the Republic.

Questions were pored relating to design philosophy, design recurrence interval, frequency of observed malfunctions, hydrological design methods and minimum allowable pipe diameters. An example of a design for a hypothetical urban sub-development was also requested.
The results show a common design philosophy throughout the country but highlight wide variations in the application of design techniques.

A method for calculating the volume of a heap of material is described. The formula for an ellipse is used to calculate the pianimetric areas of the heap. The application of the method to a heap with a circular shape will nevertheless give results to a similar degree of accuracy.